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/*
* Copyright (c) 2022-2024, Xiaohua Semiconductor Co., Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2024-12-30 CDT first version
*/
/*
* 程序清单：这是 WDT 设备使用例程
* 例程导出了 wdt_sample 命令到控制终端。
* 命令调用格式：wdt_sample set_timeout x
* 命令解释：x 对应的是超时时间，以实际计算的接近值为准
* 终端先打印N次设置的超时，然后依次递减等待N秒后复位系统(N等于设置的超时秒数)
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <stdlib.h>
#ifdef BSP_USING_WDT_TMR
#if defined(BSP_USING_WDT)
#define WDT_DEVICE_NAME "wdt"
#elif defined(BSP_USING_SWDT)
#define WDT_DEVICE_NAME "swdt"
#endif
static rt_device_t wdg_dev;
static rt_uint32_t valid_timeout = 0;
static rt_uint32_t wdt_cnt = 0;
static void idle_hook(void)
{
if (wdt_cnt < valid_timeout)
{
/* Feed watch dog */
rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_KEEPALIVE, NULL);
}
}
static void _wdt_cmd_print_usage(void)
{
rt_kprintf("wdt_sample [option]\n");
rt_kprintf(" set_timeout: set wdt timeout(S)\n");
rt_kprintf(" e.g. MSH >wdt_sample set_timeout 10\n");
}
static int wdt_sample(int argc, char *argv[])
{
int ret = RT_EOK;
rt_uint32_t timeleft;
rt_uint32_t timeout = atoi(argv[2]);
if (argc != 3)
{
_wdt_cmd_print_usage();
return -RT_ERROR;
}
if (!rt_strcmp("set_timeout", argv[1]))
{
wdg_dev = rt_device_find(WDT_DEVICE_NAME);
if (!wdg_dev)
{
rt_kprintf("find %s failed!\n", WDT_DEVICE_NAME);
return -RT_ERROR;
}
ret = rt_device_init(wdg_dev);
if (ret != RT_EOK)
{
rt_kprintf("init %s failed!\n", WDT_DEVICE_NAME);
return -RT_ERROR;
}
/* Set timeout (Unit:S) */
ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &timeout);
if (ret != RT_EOK)
{
rt_kprintf("set %s timeout failed!\n", WDT_DEVICE_NAME);
return -RT_ERROR;
}
/* Get the time when it real effective */
ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_GET_TIMEOUT, &valid_timeout);
if (ret != RT_EOK)
{
rt_kprintf("start %s failed!\n", WDT_DEVICE_NAME);
return -RT_ERROR;
}
rt_kprintf("valid_timeout = %d S\n", valid_timeout);
/* Start WDT */
ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_START, RT_NULL);
if (ret != RT_EOK)
{
rt_kprintf("start %s failed!\n", WDT_DEVICE_NAME);
return -RT_ERROR;
}
rt_thread_idle_sethook(idle_hook);
for (;;)
{
rt_thread_mdelay(1000);
rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_GET_TIMELEFT, &timeleft);
rt_kprintf("timeleft = %d S\n", timeleft);
wdt_cnt++;
}
}
else
{
_wdt_cmd_print_usage();
ret = -RT_ERROR;
}
return ret;
}
MSH_CMD_EXPORT(wdt_sample, wdt_sample[option]);
#endif
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